rear e-diff

Trying to upgrade an open Diff to an eDiff for a 2016 RRs HSE.

Things to Know;

• Topix subscription doesn't have part number for our Australian Region. They want you to deal with the dealers.
• Within the VIN the letters GA, HA etc nominate the years of manufacture and for the RRs August each year is the cut off.
• I needed to find a RMCM ( Rear Diff Control Module), Wiring harness and eDiff from another donor GA vehicle. Stag 4x4 in NZ had the harness and the correct RDCM.
• The RDCM has different connectors from 2016 to 2017 so harness and RDCM should be sourced together.
• I have yet to see if the GAP IID Tool will program the CCF for the car to get the diff working but have since bought a VCI tool from JLR to use the factory tool SDD.
• LR073345 Rear left hand half shaft is required for the eDiff to fit correctly.
• If you purchase an eDiff thats been sitting for a while get the drive shaft input seal replaced.

This eDiff upgrade is not for the faint hearted.

Cheers

Hi all,

This is the end of a long journey.

Turns out the eDiff telemetry is provided by the CHCM ( body control module ) which uses Active Roll Control and the ABS module but without ARC the eDiff won’t function.

I’m either going to fit the ARC system to my 2016 RRs L494 GA HSE or try and control the rest Diff control module or eDiff directly.

ARC is offered standard on the HSE Dynamic and above RRs.

Regards.

Quote:

---

Originally Posted by CSBrisie

All, quick query: on L494, is the rear e-diff standard on the Dynamic Pack?
I'm looking at purchasing a HSE SDV8 Dynamic....if that gets e-diff standard?
cheers

---

All SDV8's have the Dynamic transmission. In Australia the dynamic pack was a paint option??

My 16.5 doesnt have the red rear badging, the only way I can tell is the off road program graphics have two padlocks?

You could always take a peek at the diff itself. Even if you can't see the top of the diff to see if a lock motor is fitted, looking forward from underneath the rear the left side of an open diff is flat with a long spigot to the driveshaft whereas an e-diff bulges away from the line of bolts as it houses the clutch pack and has quite a short spigot to the driveshaft.